Community-created content such as vehicle packs, custom maps, or translation files.

Because the file ends in .RAR , it is a compressed folder that must be extracted using software like WinRAR or 7-Zip. Depending on where you found the link, it likely contains one of the following:

A pirated version of the full game. These are often shared in .RAR format on file-sharing sites but carry a high risk of containing malware or viruses.

Downloading .RAR files from unofficial sources—especially those with generic "DOWNLOAD FILE" titles—is risky. 112 Operator on Steam